This little herb grinder is the bomb to have in any kitchen. The teeth inside of it are metal and every sharp and grindes up herbs so fine. Great for adding flavor to your dishes that your cooking so they taste that much better. It doesn't take up alot of space in your kitchen drawers and it's easy to clean up after each use. Grinding spices up in this is so easy and smooth to do. You will be surprised at how smooth grinding spices and herbs up are in this.